While the WW1 arena idea is interesting, to be fair, Air Warrior did it already. That, and a Korean Theater with F86's and Mig-15's.
While both were fun for a couple of hops, neither arena had any sort of population at any time past introduction. Think early war arena, present day. No matter which opinion you have, most people will end up back in the Late War arenas quickly, because of the amount of choice they have there. Plane choices, Vehicle Choices, Fighter,Angles or BnZ, Bomber, attack, defend,capture..you get the point.... I remember going into either arena in Air Warrior, and struggling to find another fight. As well, remember that there were no "e-fighters" in WW1, so everyone is going to end up in the same "best turner" doing the same thing.....
I'd be happy with or without this arena. Whatever. I suspect it will run the very same course it did previously, under a community that was much tighter than our seasonal squeaker land. At least it is something new, I hope it garners new subscriptions in some way.